[INFO] crate must 0.2.0 is already in cache
[INFO] extracting crate must 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/must/0.2.0
[INFO] extracting crate must 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/must/0.2.0
[INFO] validating manifest of must-0.2.0 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of must-0.2.0 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing must-0.2.0
[INFO] finished frobbing must-0.2.0
[INFO] frobbed toml for must-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/must/0.2.0/Cargo.toml
[INFO] started frobbing must-0.2.0
[INFO] finished frobbing must-0.2.0
[INFO] frobbed toml for must-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/must/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing must-0.2.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/must/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 26b8304ce9047fe299c6481a997227c2a7ebd59e1d978c2751ab3606e9dcfaf9
[INFO] running `"docker" "start" "-a" "26b8304ce9047fe299c6481a997227c2a7ebd59e1d978c2751ab3606e9dcfaf9"`
[INFO] [stderr]    Compiling mutator v0.1.0
[INFO] [stderr]    Compiling must v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Error(Box<std::error::Error>),
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/matchers/text.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:58:40
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub trait MustBeAscii: Sized + Debug + AsciiExt {
[INFO] [stderr]    |                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:76:44
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<V> MustBeAscii for V where V: Debug + AsciiExt {}
[INFO] [stderr]    |                                            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt::is_ascii': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:60:11
[INFO] [stderr]    |
[INFO] [stderr] 60 |         if self.is_ascii() {
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt::eq_ignore_ascii_case': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |         if self.eq_ignore_ascii_case(other) {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "26b8304ce9047fe299c6481a997227c2a7ebd59e1d978c2751ab3606e9dcfaf9"`
[INFO] running `"docker" "rm" "-f" "26b8304ce9047fe299c6481a997227c2a7ebd59e1d978c2751ab3606e9dcfaf9"`
[INFO] [stdout] 26b8304ce9047fe299c6481a997227c2a7ebd59e1d978c2751ab3606e9dcfaf9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/must/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 92f6f8abcbabea80d8ee43d1a7df38c0040e91bc799e264e4dc757833fdcceb7
[INFO] running `"docker" "start" "-a" "92f6f8abcbabea80d8ee43d1a7df38c0040e91bc799e264e4dc757833fdcceb7"`
[INFO] [stderr]    Compiling must v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:42:12
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Error(Box<std::error::Error>),
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]  --> src/matchers/text.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::ascii::AsciiExt;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:58:40
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub trait MustBeAscii: Sized + Debug + AsciiExt {
[INFO] [stderr]    |                                        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:76:44
[INFO] [stderr]    |
[INFO] [stderr] 76 | impl<V> MustBeAscii for V where V: Debug + AsciiExt {}
[INFO] [stderr]    |                                            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt::is_ascii': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:60:11
[INFO] [stderr]    |
[INFO] [stderr] 60 |         if self.is_ascii() {
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::ascii::AsciiExt::eq_ignore_ascii_case': use inherent methods instead
[INFO] [stderr]   --> src/matchers/text.rs:68:11
[INFO] [stderr]    |
[INFO] [stderr] 68 |         if self.eq_ignore_ascii_case(other) {
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "92f6f8abcbabea80d8ee43d1a7df38c0040e91bc799e264e4dc757833fdcceb7"`
[INFO] running `"docker" "rm" "-f" "92f6f8abcbabea80d8ee43d1a7df38c0040e91bc799e264e4dc757833fdcceb7"`
[INFO] [stdout] 92f6f8abcbabea80d8ee43d1a7df38c0040e91bc799e264e4dc757833fdcceb7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/must/0.2.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 198dc02f6220881b8390d64c3995f7e5e5f0d96061a877dc13db4a8b3c363637
[INFO] running `"docker" "start" "-a" "198dc02f6220881b8390d64c3995f7e5e5f0d96061a877dc13db4a8b3c363637"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/must-f7386c80a0dd79bc
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test marker::collections::tests::test ... ok
[INFO] [stdout] test matchers::range::test_is_in_range ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/compile-815a5147a470b0c4
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test must_be ... ok
[INFO] [stdout] test must_be_in_range ... ok
[INFO] [stdout] test must_be_upper ... ok
[INFO] [stdout] test must_have_len ... ok
[INFO] [stdout] test test_some ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/failure-96c9042c58147f92
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test custom_msg ... ok
[INFO] [stdout] test test ... ok
[INFO] [stdout] test test_it ... ok
[INFO] [stdout] test custom_msg_fmt ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/panic_on_drop-de23925e028406f7
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_on_drop ... ok
[INFO] [stdout] test test_only_once_when_or_called ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests must
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test src/lib.rs -  (line 12) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 22) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 36) ... ignored
[INFO] [stdout] test src/lib.rs -  (line 5) ... ignored
[INFO] [stdout] test src/marker/range.rs - marker::range::RangeArgument::end (line 39) ... FAILED
[INFO] [stdout] test src/marker/range.rs - marker::range::RangeArgument::start (line 16) ... FAILED
[INFO] [stdout] test src/lazy.rs - lazy (line 9) ... ok
[INFO] [stdout] test src/lib.rs -  (line 53) ... ok
[INFO] [stdout] test src/matchers/range.rs - matchers::range::MustBeInRange::must_be_in_range (line 10) ... ok
[INFO] [stdout] test src/matchers/collections.rs - matchers::collections::MustHaveLength::must_be_empty (line 32) ... ok
[INFO] [stdout] test src/matchers/range.rs - matchers::range::MustBeInRange::must_not_be_in_range (line 29) ... ok
[INFO] [stdout] test src/matchers/option.rs - matchers::option::OptionMust::must_be_some_and (line 25) ... ok
[INFO] [stdout] test src/matchers/partial_eq.rs - matchers::partial_eq::PartialEqMust::must_be (line 12) ... ok
[INFO] [stdout] test src/matchers/collections.rs - matchers::collections::MustHaveLength::must_have_len (line 9) ... ok
[INFO] [stdout] test src/matchers/partial_eq.rs - matchers::partial_eq::MustBeBool::must_be_true (line 54) ... ok
[INFO] [stdout] test src/matchers/option.rs - matchers::option::OptionMust::must_be_some_and (line 14) ... ok
[INFO] [stdout] test src/matchers/result.rs - matchers::result::ResultMust::must_be_ok (line 14) ... ok
[INFO] [stdout] test src/matchers/result.rs - matchers::result::ResultMust::must_be_ok_and (line 41) ... ok
[INFO] [stdout] test src/matchers/result.rs - matchers::result::ResultMust::must_be_ok_and (line 29) ... ok
[INFO] [stdout] test src/matchers/text.rs - matchers::text::CasedTextMust::must_be_uppercase (line 32) ... ok
[INFO] [stdout] test src/matchers/text.rs - matchers::text::CasedTextMust::must_be_lowercase (line 11) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/marker/range.rs - marker::range::RangeArgument::end (line 39) stdout ----
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/marker/range.rs:43:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/marker/range.rs - marker::range::RangeArgument::start (line 16) stdout ----
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/marker/range.rs:20:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/marker/range.rs - marker::range::RangeArgument::end (line 39)
[INFO] [stdout]     src/marker/range.rs - marker::range::RangeArgument::start (line 16)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 15 passed; 2 failed; 4 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "198dc02f6220881b8390d64c3995f7e5e5f0d96061a877dc13db4a8b3c363637"`
[INFO] running `"docker" "rm" "-f" "198dc02f6220881b8390d64c3995f7e5e5f0d96061a877dc13db4a8b3c363637"`
[INFO] [stdout] 198dc02f6220881b8390d64c3995f7e5e5f0d96061a877dc13db4a8b3c363637